NodeJs module to calc distances between two points using coords. Originally cloned from https://gist.github.com/1604972. Response is in km
npm install distance.js --save
var distance = require('distance.js');
var start = {
latitude: Coords,
longitude: Coords
}
var end = {
latitude: Coords,
longitude: Coords
}
var distance = distance.getDistance(start, end) // Decimals is 2 by default.
var distance = distance.getDistance(start, end, 3) // Returns 3 decimals
console.log("Distance is: " + distance)